/* * Copyright (c) 2011 Anton Khirnov <anton@khirnov.net> * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * libcdio CD grabbing */ #include <cdio/cdda.h> #include <cdio/paranoia.h> #include "libavutil/log.h" #include "libavutil/mem.h" #include "libavutil/opt.h" #include "libavformat/avformat.h" #include "libavformat/internal.h" /* cdio returns some malloced strings that need to be free()d */ #undef free typedef struct CDIOContext { const AVClass *class; cdrom_drive_t *drive; cdrom_paranoia_t *paranoia; int32_t last_sector; /* private options */ int speed; int paranoia_mode; } CDIOContext; static av_cold int read_header(AVFormatContext *ctx) { CDIOContext *s = ctx->priv_data; AVStream *st; int ret, i; char *err = NULL; if (!(st = avformat_new_stream(ctx, NULL))) return AVERROR(ENOMEM); s->drive = cdio_cddap_identify(ctx->filename, CDDA_MESSAGE_LOGIT, &err); if (!s->drive) { av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->filename); return AVERROR(EINVAL); } if (err) { av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); free(err); } if ((ret = cdio_cddap_open(s->drive)) < 0 || !s->drive->opened) { av_log(ctx, AV_LOG_ERROR, "Could not open disk in drive %s.\n", ctx->filename); return AVERROR(EINVAL); } cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT); if (s->speed) cdio_cddap_speed_set(s->drive, s->speed); s->paranoia = cdio_paranoia_init(s->drive); if (!s->paranoia) { av_log(ctx, AV_LOG_ERROR, "Could not init paranoia.\n"); return AVERROR(EINVAL); } cdio_paranoia_modeset(s->paranoia, s->paranoia_mode); st->codec->codec_type = AVMEDIA_TYPE_AUDIO; if (s->drive->bigendianp) st->codec->codec_id = CODEC_ID_PCM_S16BE; else st->codec->codec_id = CODEC_ID_PCM_S16LE; st->codec->sample_rate = 44100; st->codec->channels = 2; if (s->drive->audio_last_sector != CDIO_INVALID_LSN && s->drive->audio_first_sector != CDIO_INVALID_LSN) st->duration = s->drive->audio_last_sector - s->drive->audio_first_sector; else if (s->drive->tracks) st->duration = s->drive->disc_toc[s->drive->tracks].dwStartSector; avpriv_set_pts_info(st, 64, CDIO_CD_FRAMESIZE_RAW, 2*st->codec->channels*st->codec->sample_rate); for (i = 0; i < s->drive->tracks; i++) { char title[16]; snprintf(title, sizeof(title), "track %02d", s->drive->disc_toc[i].bTrack); avpriv_new_chapter(ctx, i, st->time_base, s->drive->disc_toc[i].dwStartSector, s->drive->disc_toc[i+1].dwStartSector, title); } s->last_sector = cdio_cddap_disc_lastsector(s->drive); return 0; } static int read_packet(AVFormatContext *ctx, AVPacket *pkt) { CDIOContext *s = ctx->priv_data; int ret; uint16_t *buf; char *err = NULL; if (ctx->streams[0]->cur_dts > s->last_sector) return AVERROR_EOF; buf = cdio_paranoia_read(s->paranoia, NULL); if (!buf) return AVERROR_EOF; if (err = cdio_cddap_errors(s->drive)) { av_log(ctx, AV_LOG_ERROR, "%s\n", err); free(err); err = NULL; } if (err = cdio_cddap_messages(s->drive)) { av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); free(err); err = NULL; } if ((ret = av_new_packet(pkt, CDIO_CD_FRAMESIZE_RAW)) < 0) return ret; memcpy(pkt->data, buf, CDIO_CD_FRAMESIZE_RAW); return 0; } static av_cold int read_close(AVFormatContext *ctx) { CDIOContext *s = ctx->priv_data; cdio_paranoia_free(s->paranoia); cdio_cddap_close(s->drive); return 0; } static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags) { CDIOContext *s = ctx->priv_data; AVStream *st = ctx->streams[0]; cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET); st->cur_dts = timestamp; return 0; } #define OFFSET(x) offsetof(CDIOContext, x) #define DEC AV_OPT_FLAG_DECODING_PARAM static const AVOption options[] = { { "speed", "Drive reading speed.", OFFSET(speed), AV_OPT_TYPE_INT, { 0 }, 0, INT_MAX, DEC }, { "paranoia_mode", "Error recovery mode.", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" }, { "verify", "Verify data integrity in overlap area", 0, AV_OPT_TYPE_CONST, { PARANOIA_MODE_VERIFY }, 0, 0, DEC, "paranoia_mode" }, { "overlap", "Perform overlapped reads.", 0, AV_OPT_TYPE_CONST, { PARANOIA_MODE_OVERLAP }, 0, 0, DEC, "paranoia_mode" }, { "neverskip", "Do not skip failed reads.", 0, AV_OPT_TYPE_CONST, { PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" }, { NULL }, }; static const AVClass libcdio_class = { .class_name = "libcdio indev", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; AVInputFormat ff_libcdio_demuxer = { .name = "libcdio", .read_header = read_header, .read_packet = read_packet, .read_close = read_close, .read_seek = read_seek, .priv_data_size = sizeof(CDIOContext), .flags = AVFMT_NOFILE, .priv_class = &libcdio_class, };